Steam-pump.



PATENTED OCT. 9, 1906.

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PATENTED OCT. 9, 1906.

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UNITED STATES PATENT OFFICE.

PEDER- PAULSEN, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR TO EPPING-OARPENTER COMPANY, OF PITTSBURG, PENNSYLVA- NIA, A CORPORATION.

STEAM-PUMP.

Specification of Letters Patent.

Patented Oct. 9, 1906.

To all whom it may concern.-

Be it known that I, PEDER PAULsEN, a citizen of Norway, residing at Pittsburg, in the county of Allegheny and State of Pennsyl- Vania, have invented or discovered certain new and useful Improvements in Steam- Pumps, of which improvements the following is a specification.

The invention described herein relates to certain improvements in vertical steampumps, and has for its object the provision of means for balancing the moving parts, so

that the' steam-pressure may be utilized wholly or practically so in doing useful work 0,. a, pumping water.

The invention is hereinafter more fully described and claimed.

In the accompanying drawings, forming a part of this specification, Figure 1 is a front elevation of a steam-pump having my improvements applied thereto. Fig. 2 is a side elevation of the same. Fig. 3 is a view, partly in elevation and "partly in section, showing the lower portions of the steam-cylinders, the rods connecting the steam and water pistons, and the balancing-cylinders Fig. 4 is a view,

partly in elevation and partly in section, illus' trating the means employed for balancing the valves of the high and low pressure cylinders; and Fig. 5 is a front elevation of the steam-cylinders, &c., illustrating a modification of my improvements.

In the practice of my invention the pistonrods 1 and 1 are connected, respectively, to

the steam-pistons in the high and low pressure cylinders 2 2 and 3 3 and to the pistons in the pumping-cylinders 4 and 4*. As will be readily understood, the weights of the several pistons and piston-rods will be very considerable in large pumps, and hence unless provision is made for counterbalancing them considerable useful pressure in the steam-cylinders must be utilized for lifting these moving parts. In order to balance these moving parts, cylinders 5 and 5 are secured in such manner to the frame of the pump that their axes will coincide with the axes of the pistonrods 1 and 1 which pass through these cylinders, suitable stuffing-boxes being arranged at the ends thereof. Pistons 6 are secured to these rods so as to operate within the cylinders 5 and 5 which have theirlower ends connected, respectively, to a reservoir 7 of a caand cylinder.

pacity considerably greater than the joint capacities of these cylinders 5 and 5 This reservoir is connected by a pipe 8 and reducing-valve 9. of any suitable form or construction to the steam-supplyas, for example, to the supply-pipe 10. The reducing-valve is so adjusted as to maintain suflicient pressure within the reservoir and cylinders as to counterbalance the weights of the pistons and piston-r0 ds. As it seldom, if ever, happens that the pistons in the steam and pumping cylinders of both pumps move simultaneously in the same direction and as the capacity of the reservoir is many times greater than the joint capacities of the cylinders 5 and 5, it follows that when one of the pistons is moving down, and thereby forcing steam from its balancingcylinder into the reservoir, the other cylinder will be moving up, so that there will be little variation of pressure in the reservoir and cylinders, and therefore very little resistance on the part of the balancing mechanism to the orderly movement of the pistons of the several cylinders.

In order to counterbalance the weight of the valves of the steam-cylinders, of which there may be two or more, the valve-stem 11 of the lower cylinder is extended up into a cylinder 12, having its lower end enlarged to form a reservoir for steam. V alve-stem 11 is connected by an arm 13 to the valve-stem 14 of the upper cylinder. The reservoir connected with the lower end of the cylinders 12 has several times the capacity of said cylinder, so that the steam displaced by the down ward movement of the piston 15, connected to the stem 11, will not have any appreciable effect in raising the pressure in such reservoir Where two pairs of cylinders are employed for operating a similar number of pumps, the valve mechanism of both are counterbalanced in the same manner. Steam is admitted into the reservoirs of these cylinders through a pipe 16 and reducing-valve 9. The reservoir 7 for the counterbalancing-cylinders 5 5 and those for balancing the valves will operate as a single reservoir common to both cylinders 12, and, further, it will be understood that a single reservoir may be used to the cylinders 5, 5 and 13. In fact, such a reservoir common to all the cylinders is formed by the construction shown in Fig. 5.

I claim herein as my invention 1. A steam-pump having in combination a steam-cylinder, and piston, a water-cylinder and piston and a fluid-pressure cylinder and piston, the latter bein so connected to the steam and water cylinders as to apply a lifting force to the pistons, a reservoir having an uninterrupted connection to the fluid-pressure cylinder and connected to a source of supply of fluid-pressure whereby an approxi mately constant pressure may be maintained in the reservoir and in one end of the fluidpressure cylinder.

' 2. A steam-pump having in combination a steam-cylinder and piston, a watercylinder and piston, said cylinders being arranged in tandem and having a common piston-rod, a fluid-pressure cylinder in tandem with the other cylinders and having its piston connected to the common piston-rod, a reservoir having an uninterrupted connection with the fluid-pressure cylinder and connected to a source of supply of fiuidpressure, substantially as set forth.

3. A duplex pump having in combination steam-cylinders in tandem with the watercylinders, a fluid-pressure cylinder arranged in tandem with each set of steam and water cylinders, the pistons of said cylinders being connected to common piston-rods, a reservoir connected to the fluid-pressure cylinders and means for maintaining the balancing-pres sure in said reservoir and fluid-pressure cylind er during the reciprocation of the parts substanti ally as set forth. I

4. A steam-pump having in combination therewith a fluid-pressure cylinder and piston, the latter being so connected to the reciprocating parts of the pump as to apply a lifting force thereto and a reservoir having an uninterrupted connection with the fluid-pressure cylinder and connected to a source of supply of fluid-pressure whereby an approximately constant pressure may be maintained in the reservoir and in one end of the fluidpressure cylinder.

5. A steam-pump having in combination therewith two or four cylinders, valve mechanism controlling the flow of steam to said cylinders, a fluid-pressure cylinder having its piston so connected to the valve mechanism as to apply a lifting force thereto and a reservoir having uninterrupted connection to the fluid-pressure cylinder and piston and connected to a source of supply of fluid-pressure whereby an approximately constant pressure above atmospheric pressure may be maintained in the reservoir at one end of the fluidpressure cylinder.

In testimony whereof I have hereunto set my hand.

PEDER. PAULSEN. 

